A network of Colombian mercenaries backed by the United Arab Emirates (UAE) provided critical support to Sudan's paramilitary Rapid Support Forces (RSF), enabling it to capture the western city of el-Fasher last year, according to a report by the Conflict Insights Group (CIG). The investigation utilized mobile phone tracking data from the Colombian fighters and covers developments from April 2025 to January 2026. Despite the UAE's denials of any support, the findings strongly suggest a proven link between the Emirati government and the RSF's actions in the ongoing conflict. The fall of el-Fasher, marked by significant atrocities, is part of a wider humanitarian crisis in Sudan that has resulted in hundreds of thousands of casualties and millions displaced. This report has been characterized as the first evidence confirming UAE involvement in the RSF's military gains, spotlighting the network's role in drone operations and military training in Sudan.